Nelsonite finish?

Hi folks-
does anyone have any experience with Nelsonite finish. I have a bass that is finished with this stuff, and I'd like to learn about it.

I may have to do some work that will require refinishing, so I'd like to figure out how to work with it. Supposedly it is really cool stuff. Seals and protects wood beautifully. It's kind of a dull satin finish, and if possible, i'd like to bring out a little more gloss.

Anyway, if somone can shed some light on this question, I'd be grateful.